Tool for finishing and forming threads on the tops of glass bottles



(No Model.)

'J. REI SS & L. GERBER. Tool for Pinishing'and Forming Threadsion the Tops of Glass Bottles.-

Pate'nted May 3, I881.

NITED STATES PATENT OFFICE.

JACOB BEISS AND LOUIS GERBER, OF PITTSBURG, PENNSYLVANIA.

TOOL FOR FINISHING AND FORMING THREADS ON THE TOPS OF GLASS BOTTLES.

SPECIFICATION forming part of Letters Patent No. 240,927, dated May 3, 1881.

Application filed January 25, 1881. (No model.)

To all whom it may concern:

Beit known that we, JACOB REIss and LOUlS GERBER, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Tools for Finishing and Forming Threads on the Tops of Glass Bottles, Jars, &c.; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanyingdrawings,and to letters of reference marked thereon, which form a. part ofthis specification.

Our invention relates to tools for forming an d finishing the tops of glass bottles and jars 5 and it consists in certain improvements in the construction of the same, our improved implement having two semicircular jaws, which have threads formed on their inner sides, to form a thread on the outside of the head of the bottle or jar. Between the jaws is held a core-pin to enter the mouth of the bottle, the pin being adjustableon a rod, which also holds an adjustable plate for finishing the top of the bottle, the thread being formed and the top being finished in one quick operation.

In the accompanying drawings, Figure 1 is a front view of our improved tool. Fig. 2 is a vertical section on line a; 00 of Fig. 1. Fig. 3 is an end view.

The arms designated by A have at their extremities the semicircular jaws B, which have screw-threads formed on their inner sides, for the purpose of forming a thread on the head of the bottle.

Between and equidistant from the arms A is a rod, 0, secured at a to the upper end of the tool. The rod is threaded at its lower end for a suitable distance, and passes through a horizontal plate, D, and into the vertical corepin E, the plate and core-pin being adjustable on the 'rod. A nut, d, on the rod serves to hold the plate D firmly in place. As shown in the drawings, the plate I) is held in a horizontal position above the jaws B, so that the top of the bottle, coming in contact with the lower surface of the plate, is finished and made smooth. r

F indicates a guide on the rod C, its extremities passing through apertures in the arms A.

In operation the bottle, beingheld by clamps, is rapidly rotated, the tool is applied to the head of the bottle, and the thread is formed thereon by the jaws B. The head then, coming in contact with the plate D, is finished off smooth and even, and the common practice of grinding off the top, whereby many bottles are broken, is avoided.

We claim- The horizontal plate D, adjustable to the lengths of the necks and adapted to finish the tops of bottles, in combination with the jaws A, having screw-threads adapted to form screw threads on the outside of the necks of bottles, substantially as described.

In testimony that we claim the foregoing as our own we have affixed our signatures in presence of two witnesses.

JACOB REISS. LOUIS GERBER. Witnesses O. BERINGER, W. (J. BERINGER. 

